Position-indicator for elevators.



u 13 If f7 f//V y Aff/5 R. A. GRISWQLD s; J. ZANG.

POSITION INDICATOR FOR ELEVATORS.

APPLICATION FILED MAY 26,"1908.

Patented. Judy 27, 1909.

w @Wi @JSA WV M

R. A. GRISWOLD/ J. ZANG.

K POSITION INDICATOR FOR ELEVATORS.

APPLICATION FILED MAY 26,1908.

Patented July 27, 1909.

4 SHEETS-SHEET 2,

R. A. GRISWOLD & J. ZANG.

POSITION INDICATOR POR BLBVATORS.

APPLICATION FILED MAY 26] 1908.

929,21 1, Patented July 27, 1909 v R. A. GRISWOLD & J. ZANG. POSITION INDICATOR FOR IILBVATORS.

APPLICATION FILED MAY 2B. 1908.

Patented July 27, 1909.

4 SHEETS-SHEET 1'.

g ROY ALBERT GRISWOLD AND JOHN zinefoigl SEATTLE, wasnmoron.

-. rosn'IoN-mmca-'rcn ron nnnvarons.

, Patenten .Tilly .27; 1909.5

Application met lay 26,1908. serial-uo. 435,147.

following is a clear and concise specification'.

Our invention relates to a position indicator to facilitate starting a, plurality of elevators thus obviating the necessity of a man I em loyed for this purpose.

he'objects of our inventioi'i-are to alord a means for si'naling the position of the several elevators orthe purpose of starting the same at uniform'periods; to provide a means Whereby'tW-o or moreelevators inay be kept in operation at evenly divided distances throughout' their 'respectiveroutes of travel, We. accomplish these-as weil as minor objects4 by' the construction now preferred by'ius and illustrated in the accompanying 'drugsvings in which-f igure `1 is an elevation showing the application of our device; Figs. 2, 3,4, 5, 'and 6 vare dia-grammatical views showingthe position of the elevators and the 4view of lights due to saidposition; Fig. 7 is an elevation showing the elevator shaftsl and machinery connected-therewith; Fig. 8-is an elevation of the automatic current switching device;

9 is an end view of 8 with 'the rocket removed; Fig; 1() is a pillan view of e insulated bar and parts attac s t f ed thereto;

3.5 Fig. .1'1 1s a hm vierT showing the travel of the movai le contact members; Fig. 12 shows the plicatioii of a friction sprocket secured toalihedrum .shaft of the elevator.; Fig. 13 is an elevation of the friction sprocket; Fig. 14 is a modification showing c. pulfleyse cured to the drum shaft; Fig. 1511s a wiring'.

diagram used' widens it is desired to indicate the position of abpart'oi' the elevators..

Similar reference numerals refer to similar parts '-throu hout the several views vof our ustrated in the accoiixztpanyingl device as il drawings.

Our invention consists of a system of wiring and also parts 'connected by said wiring and operated bythe relative np ositior'is of the.

elevators such as are common an use in otlice buildingaetc. .and we have shown for the purpose of illustration am elevator 1, an 'elevater 2 and an elevator 3 :and iby referring to Figs. 1 toiciusive of the aeoompanyingv vator 1 operates in fixed relation to the mov# elevator 3, as being started upwardlyby the indicated by thearrow and said elevator. 3

as shown in Figi 2 of t e accompanying drawings in whic on, light 12 bein visible from the eld- Aarriving at the-,position shown .inFig 5 in and 9 in which said light y7 is visi 'le from s'aid elevator 1, thus signaling lsaid elevator ,the lelevator-Z will bring the elevators simi'- ted .the light 11 signaling to travel downwardly which next signaling position of the lar to that shownin IFig. 1.

20, 21,'22, y23, and 24 and movable contact va-tors 'may be wired to'start at uniform rio'ds when continuous operation. i 4wiring and automatic current switch are vconstruefted substantiallylas follows. l

"1l-he drum shaft 25 which serves to raise Aandlower the elevator 1 is preferably prorigidly secured to said a grooved s lit rim 27 P band shaft adapted to receive the toothed tor 3. Said elevator2 travels downwardlyas.. l

traveisnpwardly until the osition is reachedL said elevator -3 wlll causethenlpper-lights 1-0, 11,-and 12 to be turned elevator is signaled to advance upwardlyto advance upwardly until arriving-"atthe position illustrated in Fig.V o in which the Enger lights 1G), 11,',and l2 are shown vasI .g

followin `description willillusf etc. will be Aj hereinafter more fully set forth. 'The ele- .I

6l).- able contact member 4; elevator 2 operates relative to'the movable contact member 5 ,and Y the movable contact 6 travels in fixed relationl to the elevator 3 and in Fig. l We willconsider 6.5 lelevator 2y which has l assed the center of travehthusli hting the owerligl1ts7, 8,and 9. of which said ight 9 is visible from sald elevar vater 1 causingsaide evator Vto tra"velf'dow'iL war-diy until reaching the central position as shown in Fig. 3 of the accompanying drawsol of the accompanying drawings, thus lightingl 5 vater 3 to start on its downward traveluntil i which said elevator 3 turns yonthe li hts 7, 8, i 'i viens that rearranging the ,stationary Contact members 13, 14,`15, 116, `17, 18, 19,-'v

members 4, 5, and 6 that any number of ele.` Y

x l -hel vided with a friction sprocket 26 comprising 28 thus' forming said friction sprocket, the tension being' adjusted on the inner surface of said toothed band by means of a right and left hand screw 29.V Saidv friction sprocket 26 drives the sprocket wheel 30 which is secured tothe screw shaft 31 by means of the chain 32. Said screw shaft 31 is mounted in the bearings 33 and 34 which are supported by the brackets 35 and 36 which also supw poi't the insulated bars 37 and 38. 'lhe screw shaft 31 is provided with a threaded portion 39 which journals the friction nut 40 which is adjusted by means of the screw 41 to snugly t said threaded portion 39, thus when the direction of travel of said screw shaft 31 is changed said friction nut 40 will .swing as illustrated in Fig. 9 toward and from the insulated bars 37 and 38. K' Each of the elevators is provided with a similar device to that just described and the stationary contact members 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, and 24 are secured to the-several insulated bars 37 and 38 and 1 the movable contact members 4, 5, and 6 are 25, secured to said friction nutby the swinging arm causing a travel of the movable contact member as indicated by the arrows in Fig. 11. -To obviate the relation between the drum shaft 25 and the screw shaft 31 from being changed we have provided a friction ysprocket 26 which when the nut 40 strikes either of the ybearings 33 or 34 will cause said screw shaft 31 to remain stationary,v until the direction of travel of the drum shaft as .35 well as the elevator o erated thereby has changed, thus the re ation between said drum shaft and'said lscrew shaft will be adull length of theirrespective routes.- In

` 0' Fig. 14 we have shown a pulley 43 secured to said drum shaft 25 and may also represent 'j a similar pulley on the screw shaft 31 thus as'said nut: 40 strikes either of the'bearings 33 0r 34 the belt traveling on said pulley will slip 'performing the same function as 1 said friction sprocket 26.

i The stationary contact members 13, 15, 17, 19, 21 and 23are connected to the main line 44 and the stationaiycontact members v"1.50 A141 1.8 land 22 are co'i'inectedv to the lower Iig ts 7, 8, and 9 `by means of the wire 45 and .Illethe stationary contact members 16, 20 and 2 4 are connected to the u per lights 10, 11 and 12` by the Wire 46. e negativeside "55, of all of the lights" being connected to the wire C47, thus when the movable contact member 4 makes the connection between the stationary contact members 13 and 14 the elevator Twill be in the central position .'60 traveling downwardly and the contact memfusted each time the elevatorsv travel the ezaeii I together and the members 16, 20 and 24 are also connected operating the lights connected thereto.

In Fig. 15 we have shown tliewiring as adapted to change the signaling point from the center tothe end of the travel of the elevator, thus the current is switched from the stationary contact member 55 to the .stationary contact member 49 thus changing the point of signaling from the center of travel to substantially the end of 'the travel of k'the elevator, thus the elevato-r at the bottom Whenstarting upwardly will signal for the top elevator to advance downwardly, the third elevator not being in use. -This feature is accomplished as follows. A dou ble pole double throw switch 5() is disposed in' a convenient position and is 'connected tothe main line 44 which in Fig. 15 conveys the current through said switch 50 wires 51 and 85 52, said wire 51 being connected tothe stationary contact member 53 and said wire 52 being connected to the stationary contact member 49, thus causing the stationar contact member 55 to remain dead wh' e the 90 two elevators are running. When it -is de-' sired to run the three elevators as hereinbe-` fore set forth said switch 50 is thrown in the opposite direction from the position illustrated in Fig. 15, thus conveying the current from said main line 44 to the wire 54 which is connected to the stationary contact member 55 and making the connection at the middle of the travel of the elevator as may be clearly understood by referring to the description. ofthe three-elevator systems, thus as the elevator advances upwardly the stationary contact member 48 being connected to the to) light said light will be illuminated when the elevator is halfway to the top floor by making contacts between the` stationary contact; members 48 and 55. The stationary contact members 56 are connected in substantially the same manner as with the three elevator systems hereinbefore set forth which description relative to the travel of the elevators applies to the'` wiring shown in Fig. 15 when said switch 50 is [thrown in the opposite direction frein that shown therein. W e do'not wish to be limited to the spe.- ciiic construction illustrated in the acconti--v` panying drawings and herein set. forth, as'- we may desire to use such 'equivalent'coni stru'ctimsl as fall within the scope of the ap-l 120==,

pended. claims.

Having thus described ourinvention what we claim as new and desire to secure by l'iet- Y ters Patent of the United States, is

1. An elevator starting and signaling de- 12' vice, comprising, in combination with a plun rality of elevators, a plurality of automatic multipolar switches operative by said elevators and a signal at each end of each shaft,

all of said signals being in circuit with each A of said switches, said signals being adapted to be operated at predetermined intervals and in predetermined groups by the elevators en route.

2. An elevator starting and signaling device, comprising, in combination with a plurality of elevators, a plurality of automatic multipolar switches operative by said elevators and a signal at each end of each shaft, all of said signals being in circuit with each of said switches, said signals being adapted to be operated at predetermined intervals by an approaching car, en route in either shaft.

3. An elevator starting and signaling de" vice, comprising, in combination with a plurality of elevators, a plurality of automatic multipolar switches operative b v said elevators and a signal at each end of each shaft, all of said signals being in circuit with each of said switches, said switches comprising two series of oppositely disposed stationary contacts, a movable contact adapted to travel between said contacts and engage each series of contacts in succession, and means for operatinT said movable contact from its respective elevator.

4. In an elevator starting and signaling device, a plurality of elevators and a plurality of movable Contact members operated thereby in predetermined relation therewith, stationary Contact members connected to certain lights whereby one ofthe elevators signals to another of said elevators to start on the respective direction of travel thereof, and means whereby the system of wiring and lights vmay be made operative for a change of the number of elevators in the system. i Y

5. in anelevator starting apparatus, elevators, stationary contact members, mov

able Contact members traveling inpredetermined relation to saidv elevators, lights operated by said stationary contact and said movable contact members, and a switch adapled to change the signaling point relative to the travel of said elevators.

6. ln an elevator starting apparatus, elevators, stationary contact members, movvof said cars pass a predetermined able contact members traveling in redetermined relation to said elevators, ligllts bper ated by said stationary Contact and said movable contact members, and means whereby the relation of the point of signaling may bechanged relative to the disposition of said elevators in their respective routes of travel.

7. An elevator starting and signaling device comprising in combination with a plurality of elevators and shafts, lights located at each shaft and intervisible. from each elevator, and means in circuit with all of said shafts and operative from each. of said elevators for lighting saidA lights at predetermined lntervals and m predetermined grou s.A

S. In au elevator starting device, a p urahty of elevators, llghts v1s1ble from the terminal stops of all of said elevators andl means whereby one of said elevators at a predetermined point throughout its route of travel illuminates all of said lights to sig-A nal another of saidelevators waiting terminal stop to depart therefrom.

9. In a starting device, a pluralityT 'of H y lights and a plurality of elevators, said lights being disposed at the upper and lower terat its -minal stops, and meansA for lighting all of said lights at the upper terminal when any their upward travel and means for ighting all of said lights at their lower terminal when any of said elevators pass a predetermined 'point in their downward route of travel.

10. In an elevator starting device, a plu. rality of elevators, a light disposed at each end of the route of each elevator and means o erated byv any of said elevators to light all ol' the lights at the end of the route being ap roached by said.elevator.

n testimony whereof we have signed our names to this specificationlv in the presence of two subscribing witnesses.

nov vAthena? 'eniswoLn JOHN ZANG. l `Witnesses: l

PAUL'A. TALBOT, Bessin BROWN.

oint in 

